title: Study on the correlation of cytokine gene polymorphism with chronic periodontitis.
mesh_terms: D000328:Adult; D002908:Chronic Disease; D005838:Genotype; D006801:Humans; D007375:Interleukin-1 / Q000235:genetics*; D008875:Middle Aged; D010518:Periodontitis / Q000235:genetics*; D011110:Polymorphism, Genetic; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics*
chemical_list: D007375:Interleukin-1; D014409:Tumor Necrosis Factor-alpha